Dropwizard Config Providers

Utility library to assist in providing default config properties to dropwizard services

How to use it

• Add the Maven dependency (available in Maven Central)

<dependency>
    <groupId>org.kiwiproject</groupId>
    <artifactId>dropwizard-config-providers</artifactId>
    <version>[latest-version]</version>
</dependency>

• Add the following to your Configuration class:

public class YourConfiguration extends Configuration {

    private String serviceName = ServiceIdentityProvider.builder().build().getName();

}

Property resolution order of precedence

The service providers will resolve properties in the following order:

1. System property with the given system property key
2. System property with the default system property key (See the specific provider for details)
3. Environment variable with the given variable name
4. Environment variable with the default variable name (See the specific provider for details)
5. An explicit value
6. The value from an external configuration file with the given key (See ExternalPropertyProvider for details)
7. The value from an external configuration file with the default key (See the specific provider for details)
8. The value from a given supplier

Current Providers

The following providers are currently available in this library.

Provider	Description	Properties Resolved
ActiveMQConfigProvider	Resolves the connection string for ActiveMQ servers	activeMQServers
DropwizardDataSourceConfigProvider	Resolves a DataSourceFactory for connecting to a relational database in Dropwizard	dataSourceFactory
ElkLoggerConfigProvider	Resolves the connection and configuration information for an ELK Logger server	host, port, customFields
ElucidationConfigProvider	Resolves the connection and configuration for an Elucidation server	host, port, enabled
HibernateConfigProvider	Resolves default properties for a Hibernate connection	hibernateProperties
MongoConfigProvider	Resolves the connection string for Mongo servers	url
NetworkIdentityConfigProvider	Resolves a named network, useful if you want to have services run in different subnets/VPCs	network
ServiceIdentityConfigProvider	Resolves identity information for a running service	name, version, environment (deployed)
TlsConfigProvider	Resolves the properties to use in a TLS Configuration	tlsContextConfiguration
SharedStorageConfigProvider	Resolves a directory path that will be used for shared storage between services	sharedStoragePath
ZooKeeperConfigProvider	Resolves the ZooKeeper connection string	connectString

Custom Providers

Custom providers can be created by extending the ConfigProvider interface. Also, the existing providers can be extended by setting various lookup mechanisms listed in the order of precedence section.